<?php
namespace clt;
class Aisle{
	/**
     * @var array 缓存的实例
     */
    public static $instance = [];
	/**
     * @var object 操作句柄
     */
    public static $handler;
    public static $type = null;

    public static function handler($code){
    	set_time_limit(0);
        if (is_null(self::$handler)) {
        	$class = '\clt\aisle\\'.$code;
            self::$handler = new $class;
        }
        return self::$handler;
    }
}